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Biostratigraphy of the Cypress Hills Formation (Eocene to Miocene), Saskatchewan: equid types (Mammalia: Perissodactyla) and associated faunal assemblages

Published online by Cambridge University Press:  20 May 2016

John E. Storer  and
Harold N. Bryant
John E. Storer
Affiliation:
Saskatchewan Museum of Natural History, 2340 Albert Street, Regina, S4P 3V7
Harold N. Bryant
Affiliation:
Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4
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Abstract

Among the equid species named from the Cypress Hills Formation (Eocene to Miocene) of Saskatchewan, Mesohippus westoni and M. propinquus are documented from the early Chadronian Calf Creek local fauna, and M. westoni is also known from the earlier Southfork local fauna and from other Chadronian and Orellan deposits of western North America. Teeth possibly referable to Miohippus assiniboiensis are found in association with Whitneyan or early Arikareean assemblages. Miohippus grandis, not M. assiniboiensis, is the correct reference for larger Chadronian equids from Calf Creek and other local faunas. Archaeohippus stenolophus (new combination) is preserved in latest Arikareean or early Hemingfordian beds of the Cypress Hills, and occurs in faunal assemblages that show strong resemblances to the Runningwater assemblage of Nebraska.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 4 , July 1993 , pp. 660 - 669
Copyright
Copyright © The Paleontological Society 

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